Glad you liked it!

If I got you correctly, I will make some points...the main purpose of the circle system is the ability to reuse oxygen and anesthetic gas. We don't want to waste those oxygen and volatiles agents expired from the patient..we only want to let co2 out...that's why we have CO2 absorber and not halothane or sevoflurane absorber...circle system with CO2 absorber has made it possible for us to do what we call a LOW FLOW ANESTHESIA. Unlike mapleson system, CO2 is vented out mainly through high flow of fresh gas...there was wastage of oxygen and volatile gas as we vented out CO2...also about pollution.. Of course there will be risk of toxicity when reusing the gas that passes through the CO2 absorber but that depends on many factors related to CO2 absorber characteristics...toxicity depends on dryness and heat of absorber granules n other factors which modern absorbers has tackled well..You will understand more if you look into my CO2 absorber video.. hope this helps.. Good luck studying

@@AnesthesiaandCriticalcare sir in maintanance they use inhalation agents..is there any dose kept or is it same for all patient age .isthere any amount we can set in the vapouriser machine

For that you need to know about the minimum alveolar concentration (MAc) of the volatile agents which tell us about the potency..different gas gas different Practically, when we start anesthesia we start on high flow gas and anesthetics to reach the desires map..after that we reduce the flow to make sure that patients maintain the MAc..however MAc is not a guarantee that patient is fully anesthetized..we need to look into hemodynamic parameters, some monitoring like bis, entropy etc... So we need to change depending on the adequacy of anesthesia ...what we set on the dial is the percentage(v/v %) or the percentage of anesthetic gas in the total fresh gas flow...map is measured from entidal or expired gas or endtodal co2..

And Mac depaned on factor like age and many other.. can't be explained here...

@@AnesthesiaandCriticalcare ok sir thank yoh sir